Maker : National Semiconductor
Part No. : LM333

  Datasheet PDF : LM333.pdf
  Cross Reference : LM333 Cross Reference
  Buy Component : LM333 Find Stock and Price

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Product Information

LM333 3-Ampere Adjustable Negative Regulators December 2000 LM333 3-Ampere Adjustable Negative Regulator General Description The LM333 is an adjustable 3-terminal negative voltage regulator capable of supplying in excess of −3.0A over an output voltage range of −1.2V to −32V. This regulator is exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM333 features internal current limiting, thermal shutdown and safe-area compensation, making them substantially immune to failure from overloads. The LM333 serves a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM333 is an ideal complement to the LM150/LM350 adjustable positive regulators. Features n n n n n n n n n n Output voltage adjustable from −1.2V to −32V 3.0A output current guaranteed, −55˚C to +150˚C Line regulation typically 0.01%/V Load regulation typically 0.2% Excellent rejection of thermal transients 50 ppm/˚C temperature coefficient Temperature-independent current limit Internal thermal overload protection Standard 3-lead transistor package Output is short circuit protected Connection Diagram TO-3 Metal Can Package DS009065-1 Bottom View Steel TO-3 Metal Can Package (K STEEL) Order Number LM333K STEEL See NS Package Number K02A Typical Application −5.2V Regulator with Electronic Shutdown DS009065-6 © 2000 National Semiconductor Corporation DS009065 www.national.com LM333 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Internally Limited 35V Operating Junction Temperature Range LM333 Storage Temperature Lead Temperature (Soldering, 10 sec.) TO-3 Package ESD Susceptibility TMIN to TMAX −40˚C to +125˚C −65˚C to +150˚C 300˚C TBD Electrical Characteristics LM333 Specifications with standard typeface are for TJ = 25˚C, and those with boldface type apply over the full operating temperature range. (Note 3) Parameter Reference Voltage Conditions IL = 10 mA 3V ≤ |VIN − VOUT| ≤ 35V 10 mA ≤ IL ≤ 3A, P ≤ PMAX Line Regulation Load Regulation Thermal Regulation Temperature Stability Long Term Stability Adjust Pin Current Adjust Pin Current Change Minimum Load Current Current Limit (Note 5) Output Noise (% of VOUT) Ripple Rejection VOUT = 10V, f = 120 Hz CADJ = 0 µF CADJ = 10 µF Thermal Resistance Junction to Case Thermal Shutdown Temperature Thermal Resistance Junction to Ambient (No Heatsink) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device outside of its stated operating conditions. Note 2: All limits are guaranteed at either room temperature (standard type face) or at temperature extremes (bold typeface) by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Note 3: Unless otherwise specified: |VIN − VOUT| = 5V, IOUT = 0.5A, PDISS ≤ 30W. Note 4: Load and line regulation are measured at constant junction temperature, using low duty cycle pulse testing (output voltage changes due to heating effects are covered by the Thermal Regulation specification). For the TO-3 package, load regulation is measured on the output pin, 1⁄8" below the base of the package. Note 5: The output current of the LM333 is guaranteed to be ≥ 3A in the range 3V ≤ |VIN − VOUT| ≤ 10V. For the range 10V ≤ |VIN − VOUT| ≤ 15V, the guaranteed minimum output current is equal to: 30/ (VIN − VOUT). Refer to graphs for guaranteed output currents at other voltages. Typical −1.250 −1.250 0.01 0.02 0.2 0.4...

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